No wand bypass needed. Thats why I keep repeating that they are not as bad as a few years ago. They run S.S. HX's, heat/temp bypass on the unit, last step chem injection, and a simple setup that is easy that is easy to work on if needed.
Not to jinx myself, but I am still on the original coupler, and the 2nd pump belt. For the money they really are good machines. Like any of them, maintenence is key